Text Online
From:
Darwin, Emma
To:
Darwin, Ida
Date:
[6 September 1881]
Source of text:
DAR 258: 632
Summary:
No summary available.
Contributor:
Darwin Family Letters
No summary available.
Discusses some of his observations on the sleep movement in plants. Has been studying the leaflets of Crotalaria; has discovered they move to face the setting sun.